Superheater-boiler.



D. S. JACOBUS,

SUPEHHEATER BLER.

APPLICATION will muze, 29m.

Patented Aug. 24, 1915.

UNITED STATES PATENT OFFICE.

DAVID S. JACOBUS, 0F JERSEY CITY, NEW JERSEY, ASSIGNOR TO THE BABCOCK & 'WILCOX COMPANY, OF BAYONNE, NEW JERSEY,l A CORPORATION OF NEW JERSEY.

SUPERHEATER-BOILER.

Specification of Letters Patent.

Patented Aug. 24, 1915.

Application ied Juy 26, 1913. Serial No. 781,300.

To all whom, it may concern Be it known that I. DAVID S. JACoBUs, a citizen of the United States, residing at Jersey City, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Superheater Boilers, of which the following is a specification.

My invention relates to that class of water tube boilers having two or more transverse steam and water Vdrums connected by banks of tubes to corresponding mud drums, the tubes being either straight throughout their length or with curved or bent ends, and is designed to provide a boiler of this class with a superheater located at the rear of the first bank of tubes.

The invention will be understood by reference to the accompanying drawings in which- Figure 1 is a sectional side elevation of one embodiment of my invention, Fig. 2 an enlarged view of a part thereof, and Fig. 3 a section on the plane of the line 3-3 of Fig. 2.

Similar reference numerals indicate similar parts in the several views.

A boiler containing the present invention may have two or more banks of tubes. The design shown has three banks designated by the numerals 1, 2 and 3, each bank having live rows of tubes. The tubes are straight throughout their length and are expanded at their upper ends into transverse steam and water drums 4, 5 and 6, and at their lower-ends into corresponding transverse mud drums 7 8 and 9 respectively. The mud drums are supported above the Hoor of the setting so that the soot and dust which falls from the tubes or from the hot. gases, will be deposited in the space at the bottom and -at the sides of the drum, from whence it can be readily removed through suitable doors.

The steam and water drums are connected by steam circulators l() and by water circulators 11. The mud drums are connected by circulators 12. In the space -between the first and second banks of tubes are two rows of tubes 13 and 14, which tubes are bent at their upper and lower ends and the former expanded into the drums4and 7of the first banks of tubes, and the latter into the drums 5 and 8 of the middle bank. These tubes support a vertical baille 15 which forms a continuation of a wall 16 extending upwardly from the ioor to said baille. In the space between the second and rear banks of tubes are two rows of tubes 17 and 18, the former being expanded into the drums 5 and 8 of the middle bank, and the latter into the drums 6 and 9 of the rear bank of tubes. The tubes 17 and 18 support a balie 19 extending downwardly from the rear steam and water drum 6. The bales 15 and 19 extend across the boiler setting from side to side. In order to secure an ei'icient heat absorption of the gases in passing over the tubes, the gases are deflected into the banks of tubes and across the tubes by horizontal bailies 20 supported upon suitable brackets between the second and third banks of tubes; by a bailie 21 extending laterally from the vertical baille 15; and by inclined shelves 20 extending from the vertical baie 15, and also placed in the first and rear passes.

At the rear of the rst bank of tubes, in the space between said bank and the rows of tubes 13, is a superheater consisting of a series of U-shaped tubes 23 lying side by side in vertical planes and expanded at their lower ends into cross boxes 24 and 25. A pipe 26 leads from the middle steam and water drum to box 24. A suitable outlet connection is provided for box 25. These boxes are placed in the lower part of the space and are substantially horizontal and extend from one side to the other of the boiler setting. To protect the boxes from being over-heated I introduce a baiie 27, made up of suitable tiling, extending completely-across the setting from side to side, so that the only way in which the hot gases can act.directly on the superheater is by passing above the bafe. The lower part of the tiling rests on cast iron saddles 28 which are supported upon the lower curved ends of tubes 13. These cast iron saddles are made so that they do not reduce the open space between the tubes on which they rest, and the openings between the saddles and the tubes serve a useful purpose in allowing soot and dust which collects on top of the mud drum to fall down into the space at the rear and below the drum, when such soot and dust is blown to the rear by means of a steam or air lance. A portion of the tiling is supported by the rear line of straight boiler tubes of the first bank. The superheat can be adjusted by altering the height of the protecting baiile 27 without interfering withthe capacity or eiiciency of the boiler. i

The advantage of placing the superheater in the position shown, is that the maximum obtainable superheat may be secured with a given amount of superheating surface, and the superheater tubes at the same time will be protected from over-heating, as the hot gases must first pass through the first bank of boiler tubes before striking the superheater. Further, the superheater is placed in a position where the lower part of the boxes are readily accessible and the arrangement is such that the ends ofthe superheater tubes where they enter the boxes may be readily inspected, and where internal cores are used the cores may be withdrawn from the tubes after the superheater is in place within the boiler setting. A

The dust which falls from the exterior surface of the superheater will find its way to the space at the bottom of the boiler at the rear of the mud drum of the first bank of tubes, where it will not interfere with the action of the superheater or boiler, and the arrangement of the protecting tiling 27 is such that any dust which collects on top of the mud drum of the first bank of tubes may, as already stated, be blown by means of a steam or air lance to the rear of the mud drums, and will fall through the openings 28 between the saddle pieces 28 into the space at the rear and below this mud drum, in wlich space it may be cleaned out at interva s.

A boiler for the utilization of waste heat is shown, the gases entering through the flue 29, but it is applicable to any class of service. The hot gases first make a single pass across the lower part of the first bank of tubes, thence over the superheater tubes and are then defiected, by baffle 21, between the upper portion of the tubes of the first bank, thence across and down over the tubes of the second bank, and thence across and upwardly over the tubes of the third bank to the stack outlet 30. In their general down and up course along the tubes of the middle and rear banks the gases are made to cross and recross the tubes of said banks by means of the cross baffles 2O and inclined shelves 20'.

As shown in the drawing, the space between the first bank of tubes and the baffle l5 is wider than the spaces between the second and third banks of tubes and the vertical baffles. This wider space enables a man to enter alongside the superheater for the purpose of cleaning or brushing down the superheater surfaces by hand.

What I claim and desire to secure by Letters Patent of the United States is 1. A water tube boiler having a plurality of transverse steam and water drums connected by banks of tubes to corresponding transverse mud drums, and a superheater with vertical loops at the rear of the first bank of tubes, there being a protected space back of the first bank of tubes, and transverse boxes into which said tubes are expanded, said boxes being in proximity to the lower part of the first bank and within said protected space.

2. A water tube boiler having a plurality of transverse steam and water drums connected by banks of tubes to corresponding transverse muddrums, vertical baiies between the banks of tubes, and a superheater with vertical loops at the rear of the first bank of tubes, there being a protected space back of the first bank of tubes, and transverse boxes into which said tubes are expanded, said boxes being in proximity to the lower part of the first bank and within said protected space.

3. A water tube boiler having a plurality of transverse steam and water drums connected by banks of tubes to corresponding transverse mud drums, a superheater at the rear of the first bank of tubes having cross-- boxes with loops extending upwardly therefrom, and baffles at the front and back of said boxes to protect them from the direct impingement of the hot gases.

4. A water tube boiler having a plurality of transverse steam and water drums connected by banks of tubes to corresponding transverse mud drums, a superheater at the rear of' the first bank of tubes having cross boxes with loops extending upwardly therefrom, and baffles at the front and back of said boxes to protect them from the direct impingement of the hot gases, the front baffle being supported on the boiler tubes.

5. A water tube boiler having a plurality of transverse steam and water drums connected by banks of tubes to corresponding transverse mud drums, two rows of tubes between the first and second banks one of said rows being expanded into the drums of the first bank and the other into the drums of the second bank of tubes, a baffle supported by said tubes, a superheater at the rear of the first bank of tubes between said bank and said baffle, said superheater comprising cross boxes in proximity to the mud drum of the first bank of tubes, and U- shaped tubes expanded into said boxes, said U-shaped tubes being below the upper edge of the bafiie.

6. A water tube boiler having a plurality of transverse steam and water drums connected by banks of tubes to corresponding transverse mud drums, two rows of tubes between the first and second banks one of said rows being expanded into the drums of the first bank and the other into the drums of the second bank of tubes, a baiie supported by said tubes, a superheater at the rear of the first bank of tubes between said bank and said baiiie, said superheater comprising cross boxes in proximity to the mud drum of the first bank of tubes, and U- shaped tubes expanded into said boxes, and a baffle in front of said boxes, said bale being supported by one of said rows of tubes.

A water tube boiler having a plurality of transverse steam and water drums connected by banks of tubes to corresponding transverse mud drums, a row of tubes between the first and second banks of tubes said row being expanded into drums of the first bank, a superheater in the space between the rst bank of tubes and said row of tubes, said superheater' comprislng cross boxes in the lower part of said space, and a baie resting upon said row of tubes and extending upwardly to protect said boxes against direct impingement of the hot gases.

8. A water tube boiler having a plurality of transverse steam and water drums connected by banks of tubes to corresponding transverse mud drums, vertical bailles between the banks of tubes, the space at the rear of the first bank of tubes being wider than the spaces between the other banks of tubes and said vertical baffles, and a superheater in the space at therrear ofthe first bank of tubes, and a shelf above said superheater extending from the adjacent baile toward the first bank of tubes.

9. A water tube boiler having a plurality of transverse steam and water drums connected by banks of tubes to corresponding transverse mud drums, baies between said banks of tubes, a superheaterv between the first bank of tubes and the first baille, and

baille shelves for directing the fiow of the gases so as to make a single pass across the boiler tubes of the first bank, and thence over the superheater tubes, and from thence back over the same boiler tubes.

10. A water tube boiler having a plurality of transverse steam and water drums connecfed by banks of tubes to corresponding transverse mud drums, vertical baihes be tween the banks of tubes, a superheater at the rear of the first bank of tubes having cross boxes with loops extending upwardly therefrom, a baille between the first bank of tubes and the boxes to protect said boxes from the direct impingement of the hot gases, said baflie being arran ed so that there will be openings beneat the bale from which soot or dust may be blown in cleaning the boiler surfaces.

11. A water tube boiler having a plurality of transverse steam and water drums connected by banks of tubes to corresponding transverse mud drums, saddle pieces resting .on boiler tubesa a row of tubes between the first and second banks, a superheater in the space between the iirst bank of tubes and said row of tubes, and a bafiie supported on said saddle pieces to protect the cross boxes of said superheater. Y

In testimony whereof I have hereunto signed my name in the presence of two subscribing witnesses.

` DAVID S. JACOBUS. Witnesses:

EDITH CAMP, E. P. TERRY.

It is hereby certified that in Letters Patent No. 1,150,944, granted August 24, 1915,

upon the application of David S. Jacobus, of Jersey City, New Jersey, for an improvement in Superheater-Boilers, un error appears in the printed specification requiring oorreetion as follows: Page 2, line 32, for the reference-numeral "28 read 28'; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 28th day of September, A. D., 1915.

J. T. NEWTON,

Acting Commissioner of Patents.

[SEAL] 

